Abstract

A stressed fiber-optic waveguide is used to impart orbital angular momentum to a Hermite–Gaussian (HG10) laser mode. The transmitted beam has an annular intensity profile and a well-defined azimuthal phase dependence. We confirm the phase structure of the beam by observing the interference pattern produced between it and a plane wave. The transfer of the angular momentum to the light occurs because of a difference in phase velocity within the fiber for two orthogonal modes that comprise the input beam. This represents a mechanism for the transfer of orbital angular momentum to a light beam that has not hitherto been identified.

© 1998 Optical Society of America

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  1. L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman, “Orbital angular-momentum of light and the transformation of Laguerre–Gaussian laser mode,” Phys. Rev. A 45, 8185–8189 (1992).
    [CrossRef] [PubMed]
  2. H. He, M. E. J. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop, “Direct observation of transfer of angular-momentum to absorptive particles from a laser-beam with a phase singularity,” Phys. Rev. Lett. 75, 826–829 (1995).
    [CrossRef] [PubMed]
  3. M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. A 54, 1593–1596 (1996).
    [CrossRef] [PubMed]
  4. N. B. Simpson, K. Dholakia, L. Allen, M. J. Padgett, “The mechanical equivalence of the spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997).
    [CrossRef] [PubMed]
  5. K. Dholakia, N. B. Simpson, M. J. Padgett, L. Allen, “Second harmonic generation using Laguerre–Gaussian laser modes,” Phys. Rev. A 54, R3742–R3745 (1996).
    [CrossRef] [PubMed]
  6. W. L. Power, L. Allen, M. Babiker, V. E. Lembessis, “Atomic motion in light-beams possessing orbital angular-momentum,” Phys. Rev. A 52, 479–488 (1995).
    [CrossRef] [PubMed]
  7. W. K. Lai, M. Babiker, L. Allen, “Radiation forces on a two-level atom in a σ+-σ- configuration of Laguerre–Gaussian beams,” Opt. Commun. 133, 487–494 (1997).
    [CrossRef]
  8. M. Harris, C. A. Hill, J. M. Vaughan, “Optical helices and spiral interference-fringes,” Opt. Commun. 106, 161–166 (1994).
    [CrossRef]
  9. M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, J. P. Woerdman, “Helical-wave-front laser-beams produced with a spiral phaseplate,” Opt. Commun. 112, 321–327 (1994).
    [CrossRef]
  10. G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
    [CrossRef]
  11. N. R. Heckenberg, R. McDuff, C. P. Smith, A. G. White, “Generation of optical-phase singularities by computer-generated holograms,” Opt. Lett. 17, 221–223 (1992).
    [CrossRef] [PubMed]
  12. N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
    [CrossRef]
  13. M. W. Beijersbergen, L. Allen, H. E. L. O. van der Veen, J. P. Woerdman, “Astigmatic laser mode converters and transfer of orbital angular momentum,” Opt. Commun. 96, 123–132 (1993).
    [CrossRef]
  14. E. Abramochkin, V. Volostnikov, “Beam transformations and nontransformed beams,” Opt. Commun. 83, 123–135 (1991).
    [CrossRef]
  15. M. Padgett, J. Arlt, N. Simpson, L. Allen, “An experiment to observe the intensity and phase structure of Laguerre–Gaussian laser modes,” Am. J. Phys. 64, 77–82 (1996).
    [CrossRef]
  16. G. Indebetouw, “Optical vortices and their propagation,” J. Mod. Opt. 40, 73–87 (1993).
    [CrossRef]
  17. A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).
  18. J. Gower, Optical Communication Systems, 2nd ed. (Prentice-Hall, Englewood Cliffs, N.J., 1993).
  19. A. V. Mamaev, M. Saffman, A. A. Zozula, “Nonlinear decay of high order optical vortices in anisotropic media,” in Quantum Electronics and Laser Science Conference, Vol. 12 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 73–74.

1997 (2)

W. K. Lai, M. Babiker, L. Allen, “Radiation forces on a two-level atom in a σ+-σ- configuration of Laguerre–Gaussian beams,” Opt. Commun. 133, 487–494 (1997).
[CrossRef]

N. B. Simpson, K. Dholakia, L. Allen, M. J. Padgett, “The mechanical equivalence of the spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997).
[CrossRef] [PubMed]

1996 (4)

M. Padgett, J. Arlt, N. Simpson, L. Allen, “An experiment to observe the intensity and phase structure of Laguerre–Gaussian laser modes,” Am. J. Phys. 64, 77–82 (1996).
[CrossRef]

G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
[CrossRef]

M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. A 54, 1593–1596 (1996).
[CrossRef] [PubMed]

K. Dholakia, N. B. Simpson, M. J. Padgett, L. Allen, “Second harmonic generation using Laguerre–Gaussian laser modes,” Phys. Rev. A 54, R3742–R3745 (1996).
[CrossRef] [PubMed]

1995 (2)

W. L. Power, L. Allen, M. Babiker, V. E. Lembessis, “Atomic motion in light-beams possessing orbital angular-momentum,” Phys. Rev. A 52, 479–488 (1995).
[CrossRef] [PubMed]

H. He, M. E. J. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop, “Direct observation of transfer of angular-momentum to absorptive particles from a laser-beam with a phase singularity,” Phys. Rev. Lett. 75, 826–829 (1995).
[CrossRef] [PubMed]

1994 (2)

M. Harris, C. A. Hill, J. M. Vaughan, “Optical helices and spiral interference-fringes,” Opt. Commun. 106, 161–166 (1994).
[CrossRef]

M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, J. P. Woerdman, “Helical-wave-front laser-beams produced with a spiral phaseplate,” Opt. Commun. 112, 321–327 (1994).
[CrossRef]

1993 (2)

G. Indebetouw, “Optical vortices and their propagation,” J. Mod. Opt. 40, 73–87 (1993).
[CrossRef]

M. W. Beijersbergen, L. Allen, H. E. L. O. van der Veen, J. P. Woerdman, “Astigmatic laser mode converters and transfer of orbital angular momentum,” Opt. Commun. 96, 123–132 (1993).
[CrossRef]

1992 (3)

N. R. Heckenberg, R. McDuff, C. P. Smith, A. G. White, “Generation of optical-phase singularities by computer-generated holograms,” Opt. Lett. 17, 221–223 (1992).
[CrossRef] [PubMed]

N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
[CrossRef]

L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman, “Orbital angular-momentum of light and the transformation of Laguerre–Gaussian laser mode,” Phys. Rev. A 45, 8185–8189 (1992).
[CrossRef] [PubMed]

1991 (1)

E. Abramochkin, V. Volostnikov, “Beam transformations and nontransformed beams,” Opt. Commun. 83, 123–135 (1991).
[CrossRef]

Abramochkin, E.

E. Abramochkin, V. Volostnikov, “Beam transformations and nontransformed beams,” Opt. Commun. 83, 123–135 (1991).
[CrossRef]

Allen, L.

W. K. Lai, M. Babiker, L. Allen, “Radiation forces on a two-level atom in a σ+-σ- configuration of Laguerre–Gaussian beams,” Opt. Commun. 133, 487–494 (1997).
[CrossRef]

N. B. Simpson, K. Dholakia, L. Allen, M. J. Padgett, “The mechanical equivalence of the spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997).
[CrossRef] [PubMed]

G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
[CrossRef]

K. Dholakia, N. B. Simpson, M. J. Padgett, L. Allen, “Second harmonic generation using Laguerre–Gaussian laser modes,” Phys. Rev. A 54, R3742–R3745 (1996).
[CrossRef] [PubMed]

M. Padgett, J. Arlt, N. Simpson, L. Allen, “An experiment to observe the intensity and phase structure of Laguerre–Gaussian laser modes,” Am. J. Phys. 64, 77–82 (1996).
[CrossRef]

W. L. Power, L. Allen, M. Babiker, V. E. Lembessis, “Atomic motion in light-beams possessing orbital angular-momentum,” Phys. Rev. A 52, 479–488 (1995).
[CrossRef] [PubMed]

M. W. Beijersbergen, L. Allen, H. E. L. O. van der Veen, J. P. Woerdman, “Astigmatic laser mode converters and transfer of orbital angular momentum,” Opt. Commun. 96, 123–132 (1993).
[CrossRef]

L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman, “Orbital angular-momentum of light and the transformation of Laguerre–Gaussian laser mode,” Phys. Rev. A 45, 8185–8189 (1992).
[CrossRef] [PubMed]

Arlt, J.

M. Padgett, J. Arlt, N. Simpson, L. Allen, “An experiment to observe the intensity and phase structure of Laguerre–Gaussian laser modes,” Am. J. Phys. 64, 77–82 (1996).
[CrossRef]

Babiker, M.

W. K. Lai, M. Babiker, L. Allen, “Radiation forces on a two-level atom in a σ+-σ- configuration of Laguerre–Gaussian beams,” Opt. Commun. 133, 487–494 (1997).
[CrossRef]

W. L. Power, L. Allen, M. Babiker, V. E. Lembessis, “Atomic motion in light-beams possessing orbital angular-momentum,” Phys. Rev. A 52, 479–488 (1995).
[CrossRef] [PubMed]

Beijersbergen, M. W.

M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, J. P. Woerdman, “Helical-wave-front laser-beams produced with a spiral phaseplate,” Opt. Commun. 112, 321–327 (1994).
[CrossRef]

M. W. Beijersbergen, L. Allen, H. E. L. O. van der Veen, J. P. Woerdman, “Astigmatic laser mode converters and transfer of orbital angular momentum,” Opt. Commun. 96, 123–132 (1993).
[CrossRef]

L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman, “Orbital angular-momentum of light and the transformation of Laguerre–Gaussian laser mode,” Phys. Rev. A 45, 8185–8189 (1992).
[CrossRef] [PubMed]

Coerwinkel, R. P. C.

M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, J. P. Woerdman, “Helical-wave-front laser-beams produced with a spiral phaseplate,” Opt. Commun. 112, 321–327 (1994).
[CrossRef]

Dholakia, K.

N. B. Simpson, K. Dholakia, L. Allen, M. J. Padgett, “The mechanical equivalence of the spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997).
[CrossRef] [PubMed]

K. Dholakia, N. B. Simpson, M. J. Padgett, L. Allen, “Second harmonic generation using Laguerre–Gaussian laser modes,” Phys. Rev. A 54, R3742–R3745 (1996).
[CrossRef] [PubMed]

Enger, J.

M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. A 54, 1593–1596 (1996).
[CrossRef] [PubMed]

Friese, M. E. J.

M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. A 54, 1593–1596 (1996).
[CrossRef] [PubMed]

H. He, M. E. J. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop, “Direct observation of transfer of angular-momentum to absorptive particles from a laser-beam with a phase singularity,” Phys. Rev. Lett. 75, 826–829 (1995).
[CrossRef] [PubMed]

Gower, J.

J. Gower, Optical Communication Systems, 2nd ed. (Prentice-Hall, Englewood Cliffs, N.J., 1993).

Harris, M.

M. Harris, C. A. Hill, J. M. Vaughan, “Optical helices and spiral interference-fringes,” Opt. Commun. 106, 161–166 (1994).
[CrossRef]

He, H.

H. He, M. E. J. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop, “Direct observation of transfer of angular-momentum to absorptive particles from a laser-beam with a phase singularity,” Phys. Rev. Lett. 75, 826–829 (1995).
[CrossRef] [PubMed]

Heckenberg, N. R.

M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. A 54, 1593–1596 (1996).
[CrossRef] [PubMed]

H. He, M. E. J. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop, “Direct observation of transfer of angular-momentum to absorptive particles from a laser-beam with a phase singularity,” Phys. Rev. Lett. 75, 826–829 (1995).
[CrossRef] [PubMed]

N. R. Heckenberg, R. McDuff, C. P. Smith, A. G. White, “Generation of optical-phase singularities by computer-generated holograms,” Opt. Lett. 17, 221–223 (1992).
[CrossRef] [PubMed]

N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
[CrossRef]

Hill, C. A.

M. Harris, C. A. Hill, J. M. Vaughan, “Optical helices and spiral interference-fringes,” Opt. Commun. 106, 161–166 (1994).
[CrossRef]

Indebetouw, G.

G. Indebetouw, “Optical vortices and their propagation,” J. Mod. Opt. 40, 73–87 (1993).
[CrossRef]

Kristensen, M.

M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, J. P. Woerdman, “Helical-wave-front laser-beams produced with a spiral phaseplate,” Opt. Commun. 112, 321–327 (1994).
[CrossRef]

Lai, W. K.

W. K. Lai, M. Babiker, L. Allen, “Radiation forces on a two-level atom in a σ+-σ- configuration of Laguerre–Gaussian beams,” Opt. Commun. 133, 487–494 (1997).
[CrossRef]

Lembessis, V. E.

W. L. Power, L. Allen, M. Babiker, V. E. Lembessis, “Atomic motion in light-beams possessing orbital angular-momentum,” Phys. Rev. A 52, 479–488 (1995).
[CrossRef] [PubMed]

Mamaev, A. V.

A. V. Mamaev, M. Saffman, A. A. Zozula, “Nonlinear decay of high order optical vortices in anisotropic media,” in Quantum Electronics and Laser Science Conference, Vol. 12 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 73–74.

McDuff, R.

N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
[CrossRef]

N. R. Heckenberg, R. McDuff, C. P. Smith, A. G. White, “Generation of optical-phase singularities by computer-generated holograms,” Opt. Lett. 17, 221–223 (1992).
[CrossRef] [PubMed]

Padgett, M.

M. Padgett, J. Arlt, N. Simpson, L. Allen, “An experiment to observe the intensity and phase structure of Laguerre–Gaussian laser modes,” Am. J. Phys. 64, 77–82 (1996).
[CrossRef]

Padgett, M. J.

N. B. Simpson, K. Dholakia, L. Allen, M. J. Padgett, “The mechanical equivalence of the spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997).
[CrossRef] [PubMed]

G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
[CrossRef]

K. Dholakia, N. B. Simpson, M. J. Padgett, L. Allen, “Second harmonic generation using Laguerre–Gaussian laser modes,” Phys. Rev. A 54, R3742–R3745 (1996).
[CrossRef] [PubMed]

Power, W. L.

W. L. Power, L. Allen, M. Babiker, V. E. Lembessis, “Atomic motion in light-beams possessing orbital angular-momentum,” Phys. Rev. A 52, 479–488 (1995).
[CrossRef] [PubMed]

Robertson, D. A.

G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
[CrossRef]

Rubinsztein-Dunlop, H.

M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. A 54, 1593–1596 (1996).
[CrossRef] [PubMed]

H. He, M. E. J. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop, “Direct observation of transfer of angular-momentum to absorptive particles from a laser-beam with a phase singularity,” Phys. Rev. Lett. 75, 826–829 (1995).
[CrossRef] [PubMed]

N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
[CrossRef]

Saffman, M.

A. V. Mamaev, M. Saffman, A. A. Zozula, “Nonlinear decay of high order optical vortices in anisotropic media,” in Quantum Electronics and Laser Science Conference, Vol. 12 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 73–74.

Siegman, A. E.

A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).

Simpson, N.

M. Padgett, J. Arlt, N. Simpson, L. Allen, “An experiment to observe the intensity and phase structure of Laguerre–Gaussian laser modes,” Am. J. Phys. 64, 77–82 (1996).
[CrossRef]

Simpson, N. B.

N. B. Simpson, K. Dholakia, L. Allen, M. J. Padgett, “The mechanical equivalence of the spin and orbital angular momentum of light: an optical spanner,” Opt. Lett. 22, 52–54 (1997).
[CrossRef] [PubMed]

K. Dholakia, N. B. Simpson, M. J. Padgett, L. Allen, “Second harmonic generation using Laguerre–Gaussian laser modes,” Phys. Rev. A 54, R3742–R3745 (1996).
[CrossRef] [PubMed]

Smith, C. P.

N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
[CrossRef]

N. R. Heckenberg, R. McDuff, C. P. Smith, A. G. White, “Generation of optical-phase singularities by computer-generated holograms,” Opt. Lett. 17, 221–223 (1992).
[CrossRef] [PubMed]

Smith, G. M.

G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
[CrossRef]

Spreeuw, R. J. C.

L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman, “Orbital angular-momentum of light and the transformation of Laguerre–Gaussian laser mode,” Phys. Rev. A 45, 8185–8189 (1992).
[CrossRef] [PubMed]

Turnbull, G. A.

G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
[CrossRef]

van der Veen, H. E. L. O.

M. W. Beijersbergen, L. Allen, H. E. L. O. van der Veen, J. P. Woerdman, “Astigmatic laser mode converters and transfer of orbital angular momentum,” Opt. Commun. 96, 123–132 (1993).
[CrossRef]

Vaughan, J. M.

M. Harris, C. A. Hill, J. M. Vaughan, “Optical helices and spiral interference-fringes,” Opt. Commun. 106, 161–166 (1994).
[CrossRef]

Volostnikov, V.

E. Abramochkin, V. Volostnikov, “Beam transformations and nontransformed beams,” Opt. Commun. 83, 123–135 (1991).
[CrossRef]

Wegener, M. J.

N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
[CrossRef]

White, A. G.

Woerdman, J. P.

M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, J. P. Woerdman, “Helical-wave-front laser-beams produced with a spiral phaseplate,” Opt. Commun. 112, 321–327 (1994).
[CrossRef]

M. W. Beijersbergen, L. Allen, H. E. L. O. van der Veen, J. P. Woerdman, “Astigmatic laser mode converters and transfer of orbital angular momentum,” Opt. Commun. 96, 123–132 (1993).
[CrossRef]

L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman, “Orbital angular-momentum of light and the transformation of Laguerre–Gaussian laser mode,” Phys. Rev. A 45, 8185–8189 (1992).
[CrossRef] [PubMed]

Zozula, A. A.

A. V. Mamaev, M. Saffman, A. A. Zozula, “Nonlinear decay of high order optical vortices in anisotropic media,” in Quantum Electronics and Laser Science Conference, Vol. 12 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 73–74.

Am. J. Phys. (1)

M. Padgett, J. Arlt, N. Simpson, L. Allen, “An experiment to observe the intensity and phase structure of Laguerre–Gaussian laser modes,” Am. J. Phys. 64, 77–82 (1996).
[CrossRef]

J. Mod. Opt. (1)

G. Indebetouw, “Optical vortices and their propagation,” J. Mod. Opt. 40, 73–87 (1993).
[CrossRef]

Opt. Commun. (6)

M. W. Beijersbergen, L. Allen, H. E. L. O. van der Veen, J. P. Woerdman, “Astigmatic laser mode converters and transfer of orbital angular momentum,” Opt. Commun. 96, 123–132 (1993).
[CrossRef]

E. Abramochkin, V. Volostnikov, “Beam transformations and nontransformed beams,” Opt. Commun. 83, 123–135 (1991).
[CrossRef]

W. K. Lai, M. Babiker, L. Allen, “Radiation forces on a two-level atom in a σ+-σ- configuration of Laguerre–Gaussian beams,” Opt. Commun. 133, 487–494 (1997).
[CrossRef]

M. Harris, C. A. Hill, J. M. Vaughan, “Optical helices and spiral interference-fringes,” Opt. Commun. 106, 161–166 (1994).
[CrossRef]

M. W. Beijersbergen, R. P. C. Coerwinkel, M. Kristensen, J. P. Woerdman, “Helical-wave-front laser-beams produced with a spiral phaseplate,” Opt. Commun. 112, 321–327 (1994).
[CrossRef]

G. A. Turnbull, D. A. Robertson, G. M. Smith, L. Allen, M. J. Padgett, “The generation of free-space Laguerre–Gaussian modes at millimetre-wave frequencies by use of a spiral phaseplate,” Opt. Commun. 127, 183–188 (1996).
[CrossRef]

Opt. Lett. (2)

Opt. Quant. Electron. (1)

N. R. Heckenberg, R. McDuff, C. P. Smith, H. Rubinsztein-Dunlop, M. J. Wegener, “Laser beams with phase singularities,” Opt. Quant. Electron. 24, S951–S962 (1992).
[CrossRef]

Phys. Rev. A (4)

L. Allen, M. W. Beijersbergen, R. J. C. Spreeuw, J. P. Woerdman, “Orbital angular-momentum of light and the transformation of Laguerre–Gaussian laser mode,” Phys. Rev. A 45, 8185–8189 (1992).
[CrossRef] [PubMed]

M. E. J. Friese, J. Enger, H. Rubinsztein-Dunlop, N. R. Heckenberg, “Optical angular-momentum transfer to trapped absorbing particles,” Phys. Rev. A 54, 1593–1596 (1996).
[CrossRef] [PubMed]

K. Dholakia, N. B. Simpson, M. J. Padgett, L. Allen, “Second harmonic generation using Laguerre–Gaussian laser modes,” Phys. Rev. A 54, R3742–R3745 (1996).
[CrossRef] [PubMed]

W. L. Power, L. Allen, M. Babiker, V. E. Lembessis, “Atomic motion in light-beams possessing orbital angular-momentum,” Phys. Rev. A 52, 479–488 (1995).
[CrossRef] [PubMed]

Phys. Rev. Lett. (1)

H. He, M. E. J. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop, “Direct observation of transfer of angular-momentum to absorptive particles from a laser-beam with a phase singularity,” Phys. Rev. Lett. 75, 826–829 (1995).
[CrossRef] [PubMed]

Other (3)

A. E. Siegman, Lasers (University Science, Mill Valley, Calif., 1986).

J. Gower, Optical Communication Systems, 2nd ed. (Prentice-Hall, Englewood Cliffs, N.J., 1993).

A. V. Mamaev, M. Saffman, A. A. Zozula, “Nonlinear decay of high order optical vortices in anisotropic media,” in Quantum Electronics and Laser Science Conference, Vol. 12 of 1997 OSA Technical Digest Series (Optical Society of America, Washington, D.C., 1997), pp. 73–74.

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Figures (2)

Fig. 1
Fig. 1

Experimental arrangement, based on a stressed near-single-mode optical fiber, for producing annular beams with orbital angular momentum.

Fig. 2
Fig. 2

Intensity distribution of the output from the fiber and the corresponding interferogram with a reference wave resulting from various levels of applied stress.

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